EP1484387A1 - Réduction de la corrosion dans les chauffe-eau - Google Patents

Réduction de la corrosion dans les chauffe-eau Download PDF

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Publication number
EP1484387A1
EP1484387A1 EP04102501A EP04102501A EP1484387A1 EP 1484387 A1 EP1484387 A1 EP 1484387A1 EP 04102501 A EP04102501 A EP 04102501A EP 04102501 A EP04102501 A EP 04102501A EP 1484387 A1 EP1484387 A1 EP 1484387A1
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EP
European Patent Office
Prior art keywords
fuel
burner
fuel oil
oil composition
flame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04102501A
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German (de)
English (en)
Inventor
Frank Haase
Kay Krueger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
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Shell Internationale Research Maatschappij BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to EP04102501A priority Critical patent/EP1484387A1/fr
Publication of EP1484387A1 publication Critical patent/EP1484387A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/182—Organic compounds containing oxygen containing hydroxy groups; Salts thereof
    • C10L1/183—Organic compounds containing oxygen containing hydroxy groups; Salts thereof at least one hydroxy group bound to an aromatic carbon atom
    • C10L1/1832—Organic compounds containing oxygen containing hydroxy groups; Salts thereof at least one hydroxy group bound to an aromatic carbon atom mono-hydroxy
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/16—Hydrocarbons
    • C10L1/1616—Hydrocarbons fractions, e.g. lubricants, solvents, naphta, bitumen, tars, terpentine
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/182—Organic compounds containing oxygen containing hydroxy groups; Salts thereof
    • C10L1/183—Organic compounds containing oxygen containing hydroxy groups; Salts thereof at least one hydroxy group bound to an aromatic carbon atom
    • C10L1/1835—Organic compounds containing oxygen containing hydroxy groups; Salts thereof at least one hydroxy group bound to an aromatic carbon atom having at least two hydroxy substituted non condensed benzene rings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/22—Organic compounds containing nitrogen
    • C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
    • C10L1/223—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond having at least one amino group bound to an aromatic carbon atom
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/08—Use of additives to fuels or fires for particular purposes for improving lubricity; for reducing wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/08—Preparation of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2300/00—Pretreatment and supply of liquid fuel
    • F23K2300/10—Pretreatment

Definitions

  • the present invention relates to the reduction of corrosion in boilers, including standard boilers, low temperature boilers and condensing boilers, and more particularly to the reduction of high temperature corrosion in the burners thereof
  • Such boilers are typically used for heating water for commercial or domestic applications such as space heating and water heating.
  • Condensing boilers are described for example in EP-A-0789203, in particular a gas-fired condensing boiler. These boilers are called condensing boilers because the gases produced by combustion are cooled inside the apparatus until the water vapour contained therein condenses, so as to recover the latent condensation heat and transfer it to the water to be heated, which flows through said boilers. This latent heat is sometimes also used to pre-heat the combustion air.
  • a problem associated with these condensing boilers is that, when using most fuels, the liquid condensate by-products of the combustion must be contained, neutralised and/or treated and channelled away for disposal, this, however, generally being unnecessary if ultra low sulphur fuel is used. Furthermore, heat exchanger materials must be capable of withstanding the corrosive liquid condensate by-products. Steps should also be taken to ensure that the burner and igniter systems, along with other system elements such as sensors, are not fouled by moisture or condensation.
  • Natural gas is used as fuel in boilers.
  • the Netherlands which is equipped with a widespread natural gas grid, many households use a boiler for domestic heating in combination with warm water supply.
  • the wide application of these boilers is due to their attractive energy efficiency and the presence of the natural gas supply grid.
  • a disadvantage of all boilers that use natural gas is that they cannot be easily applied in regions where no natural gas grid is present.
  • a solution to this problem is to use a liquid fuel.
  • Liquid fuels can be easily transported to and stored by the end user, for example in a storage tank connected to the boiler by copper lines. Such tanks may, for example, be underground or in basements.
  • a disadvantage of the use of liquid fuels is, however, that a condensing boiler and/or the associated chimneys have to be made from different, more corrosion resistant, materials. This is a disadvantage for the manufacturer of condensing boilers because it would result in two types of boiler. Moreover, the apparatus using a liquid fuel would be more expensive due to the different more corrosion-resistant material required.
  • the general pattern of the flame of such an oil burner assembly is one of heterogeneity in terms of fuel concentrations; the pockets of fuel lean mixture give rise to high nitric oxide concentrations from both the fuel nitrogen and the atmospheric nitrogen, while the pockets of fuel rich mixture give rise to soot.
  • the visible flame from such a system is yellow.
  • the yellow colour is the visible radiation from the high temperature soot particles and this completely masks other visible radiations as far as the human eye is concerned. These soot particles result from unburnt carbon.
  • Yellow flame burners operate on the principle that a pump delivers the fuel through an electrical pre-heater which raises the fuel temperature to approximately 70°C. The pressurised fuel is then delivered through a nozzle and forms a spray. Oxygen-containing air for combustion is introduced and distributed via a so-called swirl plate to mix vigorously with the fuel spray. At the initial system start, the spray is ignited by an ignition electrode. In yellow flame systems, only an insufficient evaporation of the fuel is achieved before the combustion takes place.
  • the step-wise combustion of carbon to carbon dioxide via the intermediate carbon monoxide stage gives rise to a visible radiation in the blue region of the light spectrum.
  • the blue radiation becomes visible in a soot-free or low-luminosity flame, and oil burners for such soot-free flames are known as blue flame burners.
  • Blue flame burners are characterised in that the combustion of the hydrocarbon fuel to carbon dioxide is performed such that part of the flue gas is recycled to the flame and more suitably to the nozzle of the burner. Recycling part of the flue gas externally of the burner may effect such recirculation of the flue gas.
  • This is enabled by a flame tube, which is attached to the burner. This tube is provided with recirculation holes or slits through which the recirculated gases enter the front part of the flame tube.
  • recycling may be achieved by swirling the combustible mixture of fuel and oxygen-containing gas, wherein at the axis of the swirling flame some recirculation of the flue gas takes place. Good evaporation of the fuel is reflected in lower emissions of soot, carbon monoxide, nitrogen oxides and hydrocarbons. The absence of soot particles formed during the combustion process results in an almost colourless flame, i.e. blue flame.
  • Condensing boiler technology has been available in the gas market for several years. Recently, oil-fired condensing boilers have become available. With such technology, the exhaust gas is cooled to such an extent that the water content (from hydrogen retained in the fuel itself and from humidity of the combustion air) partially condenses and releases the condensation heat, which is utilised to increase the efficiency of the system.
  • the condensate is acidic, which can lead to severe corrosion problems in the system if no corrosion-resistance is installed, especially in the heat exchanger and the exhaust system.
  • said fuel oil composition is stored for less than 60 days, more preferably less than 40 days, still more preferably less than 20 days, prior to its use in said burner.
  • the "period for which the fuel oil composition is stored" means the period commencing with the point at which the final formulation of the fuel oil composition is completed.
  • the fuel oil composition preferably contains no more than 500ppm sulphur, more preferably no more than 150ppm sulphur, even more preferably no more than 100ppm sulphur, yet more preferably no more than 50ppm sulphur, most preferably no more than 10ppm sulphur.
  • the burner used in the present invention is preferably fitted with a flame tube. Moreover, said burner is preferably a blue flame burner.
  • the fuel oil composition used in the present invention preferably contains one or more additives selected from antioxidants, hydrocarbon compounds comprising one or more heteroatoms selected from nitrogen, phosphorus and oxygen and slightly hydrotreated or straight run fuel components.
  • straight run fuel components fractions which have been obtained in the atmospheric distillation of crude petroleum refinery feedstock.
  • hydrotreated fuel components components which have been obtained by subjecting various sources of suitable hydrocarbon refinery streams to treatment with hydrogen, e.g. hydrocracking to adjust the boiling range, hydroisomerisation which can improve cold flow properties by increasing the proportion of branched paraffins, and hydrodesulphurisation to reduce sulphur content.
  • said antioxidants are preferably selected from hindered mono-, di- and poly-phenols, including ester-based hindered phenols; diarylamines; hydroquinones; alkylated p-phenylenediamines; dihydroquinolines; thioethers; trivalent phosphorus compounds; and hindered amines; and said hydrocarbon compounds coomprising one or more heteroatoms selected from nitrogen, phosphorus and oxygen are preferably selected from heterocyclic and/or polyaromatic compounds comprising one or more heteroatoms selected from nitrogen, phosphorus and oxygen.
  • Particularly preferred such additives for use in the present invention are selected from IRGANOX L57, IRGANOX L135, IRGANOX L06 and IRGALUBE F10 (all ex. Specialty Chemicals Inc), trimethylphenol and esters thereof, quinoline, quinaldine and trimethylpyridine (all ex. Aldrich).
  • Said additives are preferably present in the amount of 10 to 500ppm, more preferably 50 to 500ppm, still more preferably 50 to 250ppm, most preferably 50 to 150ppm, and particularly about 50ppm.
  • a boiler housing 1 contains a centrally positioned burner 2, which is shown schematically.
  • a burner flame exists in a combustion space 3, which is enclosed by an end wall 4 and a heat exchanger tube wall 5. Flue gases can leave the combustion space 3 through openings in the wall 5 to enter an annular space 6, which is enclosed by further heat exchanger tube wall segments 7.
  • the housing 1 further is provided with means 14 to supply cold water to the heat exchanger tube wall 4,5 and means 15 to discharge heated water from said tube wall 4,5.
  • the housing 1 is further provided with a chimney 8 connected to space 6 for discharging flue gas. Air provided to the burner 2 via van 16 is pre-heated by flue gas leaving the housing by passing the air countercurrently along the chimney 8 in an annular space 9.
  • water condensates and the condensate is discharged to a drain 10 via a conduit 11.
  • An oil pump 12 is provided to supply the fuel and an expansion vessel 13 is also shown.
  • Figure 2 shows a blue flame burner 21 having a means 22 to supply a liquid fuel and a means 23 to supply an oxygen-containing gas.
  • the oxygen containing gas is usually air.
  • a nozzle 24 supplies the fuel by forming a spray. Fuel and air are mixed downstream of the nozzle 24 to form a combustible mixture which is fed to a pre-combustion space 25, which is formed by the interior of a tubular part 26.
  • Tubular part 26 is positioned co-axially in a larger tubular part 27, which forms a final combustion space 28.
  • Flue gas is discharged via an outlet opening 29 into an outlet space 30.
  • Openings 31 in tubular part 27 serve as means to recycle part of the flue gas to the final combustion space 28.
  • Openings 32 in tubular part 26 serve as means to recycle part of the gas present in the final combustion space 28 to the pre-combustion space 25.
  • FIG 3 shows an optimised yellow flame burner having pumping means 41 to supply a liquid fuel and a fan 42 to supply an oxygen-containing gas.
  • the oxygen-containing gas is usually air.
  • the fuel is dispersed in a nozzle 43 in the form of a spray and mixed with the air to form a combustible mixture, which is fed to a combustion space 44 via a conically shaped swirl plate 45.
  • a means 46 is provided to ignite the mixture.
  • the combustion space 44 is formed by the interior of a tubular part 47. Flue gas is discharged via an outlet opening 48 into an outlet space 49. Part of the flue gas is recycled to the combustion space 44.
  • the burner used in the boiler is preferably a blue flame burner, but may be an optimised yellow flame burner, each provided with a flame tube. Both types of burner are well-known and are for example described in the general textbook, "Heizung + Klimatechnik 01/02" German Version by Recknagel, Sprenger, Schramek, ISBN: 3-468-26450-8, on pages 718-719.
  • the operating conditions of the optimised yellow or blue flame burner may be the same as the operating conditions used for the state of the art liquid fuels.
  • the proportion of air in excess of that required for stoichiometric combustion is known as the excess air ratio or "lambda", which is defined as the ratio of total air available for combustion to that required to burn all of the fuel.
  • the lambda is between 1 and 2, more preferably between 1 and 1.6, and most preferably between 1 and 1.2.
  • the fuel used in the process of the present invention may comprise fuel fractions such as the kerosene or gas oil fractions obtained in traditional refinery processes, which upgrade crude petroleum feedstock to useful products.
  • fuel fractions such as the kerosene or gas oil fractions obtained in traditional refinery processes, which upgrade crude petroleum feedstock to useful products.
  • such fractions contain components having carbon numbers in the range 5-40, more preferably 5-31, yet more preferably 6-22, and such fractions have a density at 15°C of 650-950 kg/m 3 , a viscosity at 20°C of 1-80 mm 2 /s, and a boiling range of 150-400°C.
  • Preferred fuel fractions are the ultra low sulphur (e.g. less than 50 ppm sulphur) fractions, which are currently on the market.
  • non-mineral oil based fuels such as bio-fuels or Fischer-Tropsch derived fuels, may also form or be present in the fuel composition.
  • the fuel oil composition will preferably comprise more than 50 wt%, more preferably more than 70 wt%, of a Fischer-Tropsch derived fuel component.
  • a Fischer-Tropsch derived fuel component is any fraction of the middle distillate fuel range, which can be isolated from the (hydrocracked) Fischer-Tropsch synthesis product. Typical fractions will boil in the naphtha, kerosene or gas oil range. Preferably. a Fischer-Tropsch product boiling in the kerosene or gas oil range is used because these products are easier to handle in for example domestic environments.
  • Such products will suitably comprise a fraction larger than 90 wt% which boils between 160 and 400°C, preferably to about 370°C.
  • Fischer-Tropsch derived kerosene and gas oils are described in EP-A-0583836, WO-A-97/14768, WO-A-97/14769, WO-A-00/11116, WO-A-00/11117, WO-A-01/83406, WO-A-01/83648, WO-A-01/83647, WO-A-01/83641, WO-A-00/20535, WO-A-00/20534, EP-A-1101813, US-A-5766274, US-A-5378348, US-A-5888376 and US-A-6204426.
  • the Fischer-Tropsch product will suitably contain more than 80 wt% and more suitably more than 95 wt% iso and normal paraffins and less than 1 wt% aromatics, the balance being naphthenics compounds.
  • the content of sulphur and nitrogen will be very low and normally below the detection limits for such compounds. For this reason the sulphur content of the fuel oil composition may be very low.
  • the fuel composition used in the present invention may, if required, contain one or more additives as described below.
  • Detergents for example polyolefin substituted succinimides or succinamides of polyamines, for instance polyisobutylene succinimides or polyisobutylene amine succinamides, aliphatic amines, Mannich bases or amines and polyolefin (e.g. polyisobutylene) maleic anhydrides.
  • Succinimide dispersant additives are described for example in GB-A-960493, EP-A-0147240, EP-A-0482253, EP-A-0613938, EP-A-0557516 and WO-A-98/42808.
  • Particularly preferred are polyolefin substituted succinimides such as polyisobutylene succinimides.
  • OMA 350 and OMA 4130D (ex. Octel), F7661 and F7685 (ex. Infineum); stabilisers, for example KEROPON ES 3500 (ex. BASF), FOA 528A (ex. OCTEL); metal-deactivators, for example IRGAMET 30 (ex. Specialty Chemicals); cold flow improvers, for example KEROFLUX 3283 (ex. BASF), R433 or R474 (ex. Infineum); combustion improver, for example ferrocene, methylcyclopentadienylmanganese-tricarbonyl (MMT); anti-rust agents, for example RC 4801 (ex.
  • a propane-1,2-diol semi-ester of tetrapropenyl succinic acid, or polyhydric alcohol esters of a succinic acid derivative the succinic acid derivative having on at least one of its alpha-carbon atoms an unsubstituted or substituted aliphatic hydrocarbon group containing from 20 to 500 carbon atoms, e.g. the pentaerythritol diester of polyisobutylene-substituted succinic acid, KEROKORR 3232 (ex. BASF) or SARKOSYL 0 (ex. Ciba); re-odorants, for example KOMPENSOL (ex.
  • Haarmann & Reimer biociodes, for example GROTA MAR 71 (ex. Schuelke & Mayr); lubricity enhancers, for example OLI 9000 (ex. Octel), EC 832 and PARADYNE 655 (ex. Infineum), HITEC E580 (ex. Ethyl), VEKTRON 6010 (ex.
  • amide-based additives such as those available from Lubrizol, for example LZ 539 C; dehazers, for example alkoxylated phenol formaldehyde polymers such as those commercially available as NALCO EC5462A (formerly 7D07) (ex Nalco) and TOLAD 2683 and T-9318 (ex Petrolite); antistatic agents, for example Stadis 450 (ex. Octel); and foam reducers, for example the polyether-modified polysiloxanes commercially available as TEGOPREN 5851 and TEGO 2079 (ex. Goldschmidt) and Q 25907 (ex Dow Corning), SAG TP-325 (ex OSi) and RHODORSIL (ex Rhone Poulenc).
  • dehazers for example alkoxylated phenol formaldehyde polymers such as those commercially available as NALCO EC5462A (formerly 7D07) (ex Nalco) and TOLAD 2683 and T-9318 (ex Petrolite
  • antistatic agents for
  • the additive include a lubricity enhancer, especially when the fuel composition has a low (e.g. 500ppm or less) sulphur content.
  • the lubricity enhancer is conveniently present at a concentration between 50 and 1000ppm, preferably between 100 and 1000ppm.
  • the total content of the additives may be suitably between 0 and 1 wt% and preferably below 0.5 wt%.
  • Oils A, B and C had the properties as listed in Table 1.
  • the oils contained the same standard additive package.
  • the boiler was operated such that condensation of water as present in the flue gas took place on both the heat exchanging surfaces of the boiler as well as in the chimney.
  • the condensate liquid was collected with a drain and high temperature corrosion of the flame tube was observed and evaluated.
  • Figure 5 demonstrates in respect of Oils C to G an increase in the level of high temperature corrosion in line with an increase in the period for which the fuel oil is stored before use in the burner.
  • Figure 5 also demonstrates that with an increase in the concentration of the additive mixture in the fuel oils, the level of high temperature corrosion is reduced. This shows that, in addition to a reduction in the level of high temperature corrosion by reducing the storage period of the fuel oil, that level can be further reduced by inclusion of various concentrations of a suitable additive.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP04102501A 2003-06-04 2004-06-03 Réduction de la corrosion dans les chauffe-eau Withdrawn EP1484387A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04102501A EP1484387A1 (fr) 2003-06-04 2004-06-03 Réduction de la corrosion dans les chauffe-eau

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Application Number Priority Date Filing Date Title
EP03012675 2003-06-04
EP03012675 2003-06-04
EP04102501A EP1484387A1 (fr) 2003-06-04 2004-06-03 Réduction de la corrosion dans les chauffe-eau

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404087A (en) * 1965-01-04 1968-10-01 Eastman Kodak Co Stabilizing and sweetening additive for hydrocarbons
EP0476196A1 (fr) * 1990-09-20 1992-03-25 Ethyl Petroleum Additives Limited Compositions combustibles hydrocarburées et additifs pour celles-ci
US20020009685A1 (en) * 2000-05-17 2002-01-24 Adiga Kayyani C. Process for pre-heating a hydro-fuel and producing in-situ steam for cooking

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404087A (en) * 1965-01-04 1968-10-01 Eastman Kodak Co Stabilizing and sweetening additive for hydrocarbons
EP0476196A1 (fr) * 1990-09-20 1992-03-25 Ethyl Petroleum Additives Limited Compositions combustibles hydrocarburées et additifs pour celles-ci
US20020009685A1 (en) * 2000-05-17 2002-01-24 Adiga Kayyani C. Process for pre-heating a hydro-fuel and producing in-situ steam for cooking

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